Path: utzoo!attcan!uunet!mcsun!hp4nl!ruuinf!piet
From: piet@cs.ruu.nl (Piet van Oostrum)
Newsgroups: comp.text.tex
Subject: Re: eqnarray bug in LaTeX?
Message-ID: <3926@ruuinf.cs.ruu.nl>
Date: 1 Oct 90 12:24:24 GMT
References: <1990Sep25.075127.5715@sics.se>
Sender: news@ruuinf.cs.ruu.nl
Reply-To: piet@cs.ruu.nl (Piet van Oostrum)
Organization: Dept of Computer Science, Utrecht University, The Netherlands
Lines: 26
In-reply-to: bjornl@sics.se (Bj|rn Lisper)

>>>>> In article <1990Sep25.075127.5715@sics.se>, bjornl@sics.se (Bj|rn
>>>>> Lisper) (BL) writes:

BL> But if empty lines are added, like the following:

BL> \begin{eqnarray}

BL> x&=&y\\
BL> z&=&u

BL> \end{eqnarray}

BL> then LaTeX gets messed up and starts complaining about missing $ etc. Why
BL> is this? It seems to me like a newline and a space should be equal in math
BL> mode. Is this a bug?

An empty line is equal to \par in TeX and \par is forbidden in math mode
(see the TeX book, ch 26, page 293).

Of course \par could have been redefined in eqnarray environments, but it
isn't.
-- 
Piet* van Oostrum, Dept of Computer Science, Utrecht University,
Padualaan 14, P.O. Box 80.089, 3508 TB Utrecht, The Netherlands.
Telephone: +31 30 531806   Uucp:   uunet!mcsun!ruuinf!piet
Telefax:   +31 30 513791   Internet:  piet@cs.ruu.nl   (*`Pete')